Question about Acura CL

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My 97 el 1.6 is having continually failing O2 sensors. EVERTHING from basics to cat converter has been serviced and checked. the first O2 sensor was changed at 100,000 k service. this is killing my mileage. i'm getting as bad as 13.3 lt per 100 k THIS IS NOT THE MODEL I CHOSE ON YOUR OPTIONS BUT MAYBE SOME ONE CAN HELP ME ANWAY.

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  • thejet37 Oct 06, 2010

    in reply...don't know which is which. the front one was out when I had my 100,000 k service..the mileage seemed fine then. a few weeks on I noticed real bad mileage and found out the rear one had gone...since march I have had the front one go 3 more times, all along bad mileage. the most recent visit ( 6 or 8 weeks or so since last front replacement) the sensor showed the rear one locked on high..had it replaced and mileage still sucks..waiting to go back for another verdict. not using cheap parts..good after market ones that are almost as pricey as acura parts..the acura mech said they sound fine and it should not make diff

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Is it your primary or secondary O2 sensor that's failing? The secondary is just there to check that the cat is working, and shouldn't impact your gas millage. (My 97 Honda Prelude always threw a secondary O2 reading too high or too low because the cat was gutted). If it's the primary, have someone double check the actual wiring harness for the O2. The EL should use a heated O2 sensor.. which have a heater element in them to warm them up faster so they read accurate sooner. The heater wires may not be functioning, or the wire in the harness for the O2 signal may be damaged or pinched.

Posted on Oct 05, 2010

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